diff --git a/requirements.txt b/requirements.txt
index 3aed73a..c0a0203 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 numpy==2.3.5
 click==8.3.1
-sphinx==8.2.3
+sphinx==9.0.4
 myst-parser==4.0.1
 sphinxcontrib-napoleon==0.7
 pytest==9.0.2